Under normal circumstances, a Panasonic DMR model DVD player can only play DVDs from the region it is assigned to--a player assigned to Region 1, for instance, can only play DVDs from Region 1. However, you can use the remote to enter a code that unlocks the DVD player, allowing you to play DVDs from all regions.
Turn the player on. Press and hold "Shift" on the remote.
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Press "Setup," then release Shift. Press the "Enter" button twice.
Choose "Other" and enter in a region code (for example, enter 0001 for Region 1).
Press Enter, then "Return" twice. Turn the player off.